added BFM perf. test

samples/gpu/performance/tests.cpp

@@ -273,4 +273,78 @@ TEST(SURF)
     d_surf(d_src1, gpu::GpuMat(), d_keypoints1);
     d_surf(d_src2, gpu::GpuMat(), d_keypoints2);
     GPU_OFF;
+}
+
+
+TEST(BruteForceMatcher)
+{
+    RNG rng(0);
+
+    // Init CPU matcher
+
+    int desc_len = 128;
+    int num_trains = rng.uniform(1, 5);
+
+    BruteForceMatcher< L2<float> > matcher;
+
+    Mat query; 
+    gen(query, rng.uniform(100, 300), desc_len, CV_32F, 0, 10);
+
+    vector<Mat> trains(num_trains);
+    for (int i = 0; i < num_trains; ++i)
+    {
+        Mat train; 
+        gen(train, rng.uniform(100, 300), desc_len, CV_32F, 0, 10);
+        trains[i] = train;
+    }
+    matcher.add(trains);
+
+    // Init GPU matcher
+
+    gpu::BruteForceMatcher_GPU< L2<float> > d_matcher;
+
+    gpu::GpuMat d_query(query);
+
+    vector<gpu::GpuMat> d_trains(num_trains);
+    for (int i = 0; i < num_trains; ++i)
+    {
+        d_trains[i] = trains[i];
+    }
+    d_matcher.add(d_trains);
+
+    // Output
+    vector< vector<DMatch> > matches(1);
+    vector< vector<DMatch> > d_matches(1);
+
+    SUBTEST << "match";
+
+    CPU_ON;
+    matcher.match(query, matches[0]);
+    CPU_OFF;
+
+    GPU_ON;
+    d_matcher.match(d_query, d_matches[0]);
+    GPU_OFF;
+
+    SUBTEST << "knnMatch";
+    int knn = rng.uniform(3, 10);
+
+    CPU_ON;
+    matcher.knnMatch(query, matches, knn);
+    CPU_OFF;
+
+    GPU_ON;
+    d_matcher.knnMatch(d_query, d_matches, knn);
+    GPU_OFF;
+
+    SUBTEST << "radiusMatch";
+    float max_distance = rng.uniform(25.0f, 65.0f);
+
+    CPU_ON;
+    matcher.radiusMatch(query, matches, max_distance);
+    CPU_OFF;
+
+    GPU_ON;
+    d_matcher.radiusMatch(d_query, d_matches, max_distance);
+    GPU_OFF;
 }